Numbers with exactly three distinct base-9 digits.

Terms

a(0) =83a(1) =84a(2) =85a(3) =86a(4) =87a(5) =88a(6) =89a(7) =99a(8) =102a(9) =103a(10) =104a(11) =105a(12) =106a(13) =107a(14) =108a(15) =110a(16) =112a(17) =113a(18) =114a(19) =115a(20) =116a(21) =117a(22) =119a(23) =120a(24) =122a(25) =123a(26) =124a(27) =125a(28) =126a(29) =128